But I'm primarily say it sq feet and ac.
I would argue that. We had our AC unit replaced in the spring of 2019. Before doing that, we did a remodel on 80% of our house - down to the studs. My husband worked with a knowledgeable HVAC company to totally revamp the venting in our house to get it properly sized for our house, get it balanced, and whatever else they did - I stopped listening at some point, but I know it involved MATH and ENGINEERING and PRESSURES. Then they worked out the details on how big the AC unit needed to be. And to finish it all off, we re-insulated most of the house.
ANYWAY - same house, two different systems. Our old AC cost us 250-300 a month to run. The last two years (with electric prices in IL that are some of the highest in the country and just keep going up) we haven't exceeded $40 a month. So having the right venting, the correct AC unit and good insulation - no matter where you live - will definitely make a difference. In warmer climates they frequently don't insulate homes very well or at all - insulation does as much to keep the cool air in as it does to keep the cold out. Our AC unit is about 8 times bigger than our previous unit - our neighbors all laughed when they saw it going in - but it's so efficient, so quiet, and works so perfectly. And when we tell them what our electric bill is, they stop laughing.
And now - back to your regularly scheduled post!
@Killemall I'm still going with my original suggestion (and now that
@GBBUDD brought it up, I feel even smarter!) to get some kind of cover going on. But you're right - that really is more fountain than pond. I'm not sure how much better your fish will fare in the hot Vegas sun to be honest.